Trimming mechanism



Sept. 10, 1929. EYATES 1,727,850

TRIMMING MECHANISM Original Filed May 9 1916 Patented Sept. 10, 1929.

UNITED STATES PATENTFOFFICE ARTHUR EDWARD YATES, F FLIN'ISTONE, GEORGIA,ASSIGNOR TO CRYSTAL SPRINGS BLEAGI-IERY 00., OF CHIGKAMAUGA, GEORGIA, ACORPORATION OF GEORGIA.

TRIMMING MECHANISM.

Substitute for application Serial No. 96,386, filed May 9, 1916. Thisapplication filed July 24, 1926. Serial No. 124,657.

My invention relates to an improvement in trimming mechanism for sewingmachines, and is a substitute for my application Serial No. 96,386,filed May 9, 1916. The objectprimarily is to cut the raw edges ofover-lapped material simultaneously with the stitching operation.

With this object in view, my invention comprises two sets of trimmingmechanism, one set located on each side of a needle or needles, saidmechanism being operated by moving parts of the sewing-machine.

In the accompanying drawings Fig. 1 is a view in side elevation;

Fig. 2 is a sectional view; and

Figs. 3 and 4 are details.

A. represents the head of any approved type of sewing machine, thenumeral 1 being the reciprocating needle rod and 2 the needle of whichthere may be one or more, side by side accordingly, as desired.

The needle rod is operated in the present instance by connecting rod 3extending from the disc 4 on the rotary shaft 5, to the sleeve 6 securedto the needle rod.

The trimming mechanism may be of any desired form and attached in anyapproved manner and operated from any moving parts of the machine.

As one convenient exemplification of the machine, an L-shaped arm 7 isbolted securely to the one side of head A of the machine as shown inFig. 1, the lower L-end forming the fixed or lower blade 8 of onetrimming mechanism.

The moving blade 9 is pivoted at 10 at the angle of the L-shaped arm, asshown in Fig. 1. This blade 9 has an arm 11 held up to receive thefabric by a spring 12 extending from the pivoted arm 11 to the fixed orstationary arm 7, as shown in 1. A connecting bar 13 pivotally connectedwith the arm 11 extends to the stud 14. on the reciprocating guide pin15, which is slidably mounted in the hole 16 which it fits, at the lowerend of the head A, while the stud 14 is guided in an elongatedvertically disposed slot 17 in the head A, which it fits, the upper endof the guide pin 15 being in the direct path of the lower end of theconnecting bar 3, whereby the pin 15 and stud 14 are driven downwardly,with each movement of the needle rod 1, thereby causing the trimmerblades 8 and 9 to open and close and cut the fabric or other material 18extending therebetween. I

Another pair of blades 8 and 9', as shown in Figs. 3 and 4, are operatedby some moving part of the machine such as rock shaft 19, arm 20, andconnecting rod 21, asshown in Figs. 2 and 3, to simultaneously cut theedge of the fabric or other material on the other side of the needle orneedles, as shown in Fig. 2.

While it is obvious that the strips of cloth or other material to besewed together might travel, this particular form of trimmer is in-' 66tended for a sewing machine which travels across the edges of thefabric, which edges are adapted to be sewed together.

I claim: v I

1. The combination of I a reciprocating 70 needle rod arranged in asewing machine head, means for actuating said rod, a stationary armattached to the head and terminating in a fixed scissors blade, aspring-actuated movable blade pivoted to the stationary arm, and aconnecting bar extending from'the movable blade to a combined stud andpin located in position to be actuated by the means for actuating saidrod. I

2. The combination of a reciprocating needle rod, means for actuatingthe latter, a sewing machine head in which the needle rod reciprocates,a combined stud and pin slidably mounted in the head in verticalalignment with the means for actuating the needle, a 35 stationary armconnected to the head and terminating in a fixed scissors-blade, and aspring-actuated movable blade pivoted to said fixed blade and connectedby a link to said i able blade is actuated.

3. The combination of a reciprocating needle rod arranged in a sewingmachine head, means for actuating said rod, an arm attached to the headand having a scissors blade fixed thereto, a pivoted scissors blade, acombined stud and pin slidably mounted in the head in position to beoperated by the rod actuating means, and means for operatively 100reciprocating stud and pin, whereby said movconnecting the combined studand pin with the pivoted scissors blade.

4. The combination with a reciprocating 5 needle rod and means foractuating said rod,

of a fixed cutting blade, a pivoted cutting blade arranged to cooperatewith the fixed blade and a combined stud and pin operatively connectedwith the pivoted cutting blade and located in position to be actuated bythe means for actuating the needle rod.

In testimony whereof I aflix my signature.

ARTHUR EDWARD YATES.

CERTIFICATE OF CORRECTION.

Patent No. 1,727,850. Granted September 10, 1929, to

ARTHUR EDWARD YATES.

It is hereby certified that the above numbered patent was erroneouslyissued to "Crystal Springs Eieachery Co", Whereas said patent shouldhave been issued to "Curtis 5: Marble Machine Co., of Woreestor,Massachusetts, a Corporation of Massachusetts", said corporation beingassignee by meshe assignments, of the entire interest in said invention,as shown by the records of assignments in this office; and that the saidLetters Patent should he read with this correction therein that the samemay conform to the record of the case in the Patent Cftioe.

Signed and sealed this 15th day of October A. D. 1929 M. J. Moore,(Seal) Acting Commissioner of Patents.

